Use IsStreamError() and friends gMock matchers in quic/quartc.

gfe-relnote: n/a, test-only change.
PiperOrigin-RevId: 282776007
Change-Id: Ic2270f5487ed7ece336f32afb8d2520334799630
diff --git a/quic/quartc/quartc_session_test.cc b/quic/quartc/quartc_session_test.cc
index 6ed8ec5..956073b 100644
--- a/quic/quartc/quartc_session_test.cc
+++ b/quic/quartc/quartc_session_test.cc
@@ -20,6 +20,7 @@
 #include "net/third_party/quiche/src/quic/quartc/quartc_packet_writer.h"
 #include "net/third_party/quiche/src/quic/quartc/simulated_packet_transport.h"
 #include "net/third_party/quiche/src/quic/test_tools/mock_clock.h"
+#include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"
 #include "net/third_party/quiche/src/quic/test_tools/simulator/packet_filter.h"
 #include "net/third_party/quiche/src/quic/test_tools/simulator/simulator.h"
 
@@ -543,10 +544,10 @@
 
   EXPECT_TRUE(client_peer_->IsClosedStream(stream_id));
   EXPECT_TRUE(server_peer_->IsClosedStream(stream_id));
-  EXPECT_EQ(client_stream_delegate_->stream_error(stream_id),
-            QUIC_STREAM_CANCELLED);
-  EXPECT_EQ(server_stream_delegate_->stream_error(stream_id),
-            QUIC_STREAM_CANCELLED);
+  EXPECT_THAT(client_stream_delegate_->stream_error(stream_id),
+              test::IsStreamError(QUIC_STREAM_CANCELLED));
+  EXPECT_THAT(server_stream_delegate_->stream_error(stream_id),
+              test::IsStreamError(QUIC_STREAM_CANCELLED));
 }
 
 TEST_F(QuartcSessionTest, LostDatagramNotifications) {